The comments sections on angler can be a valuable source of information from people without the app that still want to contribute info. According to the comments Helicoprion apparently desynths into Savage Aim IV, and interestingly Allagan Silk from Blood-red Bonytongue and Allagan Wootz Nugget from Wootz Knifefish Zenith. I assume something desynths into the Kirumu Leather as well.